From 9b807c325d514e75835bb778be493e52dfbae3ac Mon Sep 17 00:00:00 2001
From: cketti <cketti@gmail.com>
Date: Thu, 5 Dec 2013 04:28:28 +0100
Subject: [PATCH] Add support for bitcoin URIs

---
 src/com/fsck/k9/helper/HtmlConverter.java | 4 +++-
 src/com/fsck/k9/helper/Regex.java         | 3 +++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/com/fsck/k9/helper/HtmlConverter.java b/src/com/fsck/k9/helper/HtmlConverter.java
index e17d3ed23..4ad398fc4 100644
--- a/src/com/fsck/k9/helper/HtmlConverter.java
+++ b/src/com/fsck/k9/helper/HtmlConverter.java
@@ -392,7 +392,9 @@ public class HtmlConverter {
      * @param outputBuffer Buffer to append linked text to.
      */
     private static void linkifyText(final String text, final StringBuffer outputBuffer) {
-        Matcher m = Regex.WEB_URL_PATTERN.matcher(text);
+        String prepared = text.replaceAll(Regex.BITCOIN_URI_PATTERN, "<a href=\"$0\">$0</a>");
+
+        Matcher m = Regex.WEB_URL_PATTERN.matcher(prepared);
         while (m.find()) {
             int start = m.start();
             if (start == 0 || (start != 0 && text.charAt(start - 1) != '@')) {
diff --git a/src/com/fsck/k9/helper/Regex.java b/src/com/fsck/k9/helper/Regex.java
index 8eb3765b8..dd60134a0 100644
--- a/src/com/fsck/k9/helper/Regex.java
+++ b/src/com/fsck/k9/helper/Regex.java
@@ -103,4 +103,7 @@ public class Regex {
           "[a-zA-Z0-9][a-zA-Z0-9\\-]{0,25}" +
           ")+"
       );
+
+    public static final String BITCOIN_URI_PATTERN =
+            "bitcoin:[1-9a-km-zA-HJ-NP-Z]{27,34}(\\?[a-zA-Z0-9$\\-_.+!*'(),%:@&=]*)?";
 }